I have been repeatedly impressed at how clever crows, ravens, and certain parrots are whenever we figure out how to test them. I've seen videos of Cockatoos fig

I have been repeatedly impressed at how clever crows, ravens, and certain parrots are whenever we figure out how to test them. I've seen videos of Cockatoos figuring out multi-step puzzles, and IIRC, ravens have been able to figure out puzzles with 5+ steps. I'm not even sure if I can solve a puzzle with 5+ steps :)